diff --git a/packaging/docker/Dockerfile.dev-debian-multiarch b/packaging/docker/Dockerfile.dev-debian-multiarch
index 8cdc737e6..72e07adc3 100644
--- a/packaging/docker/Dockerfile.dev-debian-multiarch
+++ b/packaging/docker/Dockerfile.dev-debian-multiarch
@@ -84,7 +84,7 @@ RUN cd /tmp && \
    git clone --recursive https://github.com/fmtlib/fmt.git && \
    mkdir -p fmt/build && cd fmt/build && \
    git checkout 6.0.0 && \
-   cmake .. && make -j$(nproc) install && \
+   cmake -DBUILD_SHARED_LIBS=1 .. && make -j$(nproc) install && \
    rm -rf /tmp/*
 			   
 # Build & Install spdlog
@@ -92,7 +92,7 @@ RUN cd /tmp && \
    git clone --recursive https://github.com/gabime/spdlog.git && \
    mkdir -p spdlog/build && cd spdlog/build && \
    git checkout v1.3.1 && \
-   cmake -DSPDLOG_BUILD_BENCH=OFF .. && make -j$(nproc) install && \
+   cmake -DCMAKE_BUILD_TYPE=Release -DSPDLOG_FMT_EXTERNAL=1 -DSPDLOG_BUILD_BENCH=OFF .. && make -j$(nproc) install && \
    rm -rf /tmp/*
 
 # Build & Install libwebsockets
diff --git a/packaging/docker/Dockerfile.dev-ubuntu b/packaging/docker/Dockerfile.dev-ubuntu
index c2b7942c2..f42acf526 100644
--- a/packaging/docker/Dockerfile.dev-ubuntu
+++ b/packaging/docker/Dockerfile.dev-ubuntu
@@ -85,7 +85,7 @@ RUN cd /tmp && \
 	git clone --recursive https://github.com/fmtlib/fmt.git && \
 	mkdir -p fmt/build && cd fmt/build && \
 	git checkout 6.0.0 && \
-	cmake .. && make -j$(nproc) install && \
+	cmake -DBUILD_SHARED_LIBS=1 .. && make -j$(nproc) install && \
 	rm -rf /tmp/*
 
 # Build & Install spdlog
@@ -93,7 +93,7 @@ RUN cd /tmp && \
 	git clone --recursive https://github.com/gabime/spdlog.git && \
 	mkdir -p spdlog/build && cd spdlog/build && \
 	git checkout v1.3.1 && \
-	cmake -DSPDLOG_BUILD_BENCH=OFF .. && make -j$(nproc) install && \
+	cmake -DCMAKE_BUILD_TYPE=Release -DSPDLOG_FMT_EXTERNAL=1 -DSPDLOG_BUILD_BENCH=OFF .. && make -j$(nproc) install && \
 	rm -rf /tmp/*
 
 # Build & Install Criterion